JP6409418B2 - Light source unit and lighting apparatus - Google Patents

Description

  The present invention relates to a light source unit including an optical lens body, and a lighting fixture.

  It is installed near the road surface (hereinafter referred to as “roadside”) and distributes the light source and the light from the light source in the traffic direction of the road surface in a lighting device such as a street light or a street light that illuminates the road surface. An optical lens body is known (for example, see Patent Document 1).

JP2013-93201A

  However, if the light from the light source is refracted with a large refraction angle in the traffic direction at the exit surface of the optical lens so that the light is directed far away in the traffic direction, there is a problem that Fresnel loss increases and efficiency decreases.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a light source unit and a lighting fixture that can irradiate far away while suppressing the Fresnel loss on the exit surface of the optical lens body.

In order to achieve the above object, the present invention provides a light source, an incident concave portion that covers the light source, and a convex shape that spreads and emits light incident from the incident surface of the incident concave portion in a first direction perpendicular to the optical axis. An optical lens body having an emission surface, and the light source is a planar light source having an optical axis at the center of the light emitting surface, and in a first direction cross section including the first direction and parallel to the optical axis, A plurality of inclined surfaces are formed on the incident surface of the optical lens body, and each of the inclined surfaces is formed so that a refraction angle at the exit surface of incident light is 50 ° or less , Provided is a light source unit characterized in that a light refraction angle on an emission surface is 70 ° or less with respect to any light of the planar light source .

According to another aspect of the present invention, there is provided an optical lens having a light source, an incident concave portion that covers the light source, and a convex emission surface that emits light incident from the incident surface of the incident recess in a first direction orthogonal to the optical axis A plurality of inclined surfaces are formed on the incident surface of the optical lens body in a first direction cross section including the first direction and parallel to the optical axis, and each of the inclined surfaces is incident The incident light has a refraction angle of 50 ° or less at the emission surface, and the incident surface has a plurality of convex portions having the inclined surface on one side surface. Provided is a light source unit characterized in that a flat portion is formed at the tip.

  According to the present invention, in the light source unit, the optical axis of the light source is aligned with a valley portion formed by two inclined surfaces facing each other in the cross section in the first direction.

  In the light source unit according to the present invention, the exit surface of the optical lens body may include a recess recessed toward the incident surface at the intersection of the optical axes of the light sources in the cross section in the first direction. .

  Moreover, this invention provides the lighting fixture provided with the some light source unit in any one of said.

According to the present invention, since the plurality of inclined surfaces of the incident surface of the optical lens body are formed so that the incident light has a refraction angle of 50 ° or less at the exit surface, the Fresnel loss at the exit surface is suppressed. Can irradiate light far away.
In addition, the angle of refraction at the exit surface is limited to 50 ° or less, which is smaller than 70 ° where the Fresnel loss is sufficiently small. The refraction angle at the surface can hardly exceed 70 °, and Fresnel loss can be suppressed.

It is a figure which shows the installation state of the road light which concerns on embodiment of this invention, (A) is the figure which looked at the road surface of the road from the cross-sectional direction, (B) is the figure which planarly viewed the road surface of the road. It is the perspective view which looked at the road light from the lower part. FIG. 3 is a perspective view showing the road light of FIG. 2 with a lower cover body and a globe omitted. It is a perspective view which abbreviate | omits an optical lens body and shows the road light of FIG. It is a perspective view which abbreviate | omits the pressing plate and module board | substrate for the road light of FIG. It is a figure which shows the arrangement | positioning relationship between an optical lens body and COB type LED, (A) is a top view, (B) is the figure seen from the back surface. It is a figure which shows the arrangement | positioning relationship between an optical lens body and COB type LED, (A) is the figure seen from the road side, (B) is the figure seen from the road side, and (C) is the figure seen from the side. FIG. 7A is a cross-sectional view taken along the line AA of FIG. 6A, and shows a cut surface (first direction cross section) cut along a plane that includes the optical axis of the optical lens body and is parallel to the first direction orthogonal to the optical axis. FIG. FIG. 7B is a cross-sectional view taken along the line B-B of FIG. 6A, and includes a cut surface cut by a plane parallel to a second direction that includes the optical axis of the optical lens body and is orthogonal to both the optical axis and the first direction (second It is the figure which looked at (direction cross section). It is a figure which shows the back surface of an optical lens body. It is a figure which shows the relationship between an optical lens body, the light emission surface of COB type LED, and a reflective mirror. It is a light ray figure in the 1st direction section of the convex lens part of an optical lens body. FIG. 13 is an enlarged view of a portion indicated by an arrow Y in FIG. 12. It is a figure which shows a response | compatibility with inclination-angle (omega) of the incident side inclined surface of an optical lens body, and inclination-angle (psi) of a convex lens part output surface for every light beam (1)-(6) in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an installation state of a road light 1 according to the present embodiment, FIG. 1 (A) is a view of a road surface 4 of a road 2 as seen from a cross-sectional direction, and FIG. FIG. FIG. 2 is a perspective view of the road lamp 1 as viewed from below. FIG. 3 is a perspective view showing the road light 1 of FIG. 2 with the lower cover body 21 and the globe 13 omitted. FIG. 4 is a perspective view showing the road lamp 1 of FIG. 3 with the optical lens body 39 omitted. FIG. 5 is a perspective view showing the road lamp 1 of FIG. 4 with the holding plate 50 and the module substrate 36 omitted.

  This road light 1 is a lighting device that illuminates a road surface 4 of an automobile-only road (hereinafter simply referred to as “road”). As shown in FIG. The main body 10 is supported. The arm-type column 5 is a column erected on the ground of a roadside 6 such as a road shoulder, and is bent from the middle of the column and the tip 3 extends in the horizontal direction. The instrument body 10 is attached to the tip 3 with a predetermined height H, a predetermined inclination angle α, and a predetermined overhang amount Oh.

As shown in FIGS. 1B and 2, the instrument body 10 has a long rectangular box shape in plan view from one end 11 </ b> A to the other end 11 </ b> B, and the tip of the column 5 near the one end 11 </ b> A. 3 and is installed with the other end 11B facing the road. As shown in FIGS. 2 and 3, an irradiation opening 12 is formed on the bottom surface 10 </ b> A of the instrument body 10 on the other end 11 </ b> B side, and this irradiation opening 12 is covered with a globe 13.
The instrument body 10 is provided with an arm insertion hole 15 on the back surface 10B (that is, the outer surface near the one end 11A). When supporting the arm-type column 5, the tip 3 of the column 5 is inserted into the arm insertion hole 15.

As shown in FIG. 2, the instrument body 10 includes a base case body 20 and a lower cover body 21, and these constitute a substantially box-shaped case body of the instrument body 10. The base case body 20 is formed by die casting using a material (for example, aluminum or aluminum alloy) that has sufficient corrosion resistance to withstand outdoor use and has high thermal conductivity. By using a highly heat conductive material, heat generated by the light source unit 25 described later is radiated from the base case body 20, and the light source temperature of the light source unit 25 is maintained at a temperature suitable for the light emitting operation. The lower cover body 21 is formed using a corrosion-resistant material (for example, stainless steel) that can sufficiently withstand outdoor use.
The base case body 20 constitutes the bottom surface 10A, the back surface 10B, the top surface 10C, the front side, and the left and right outer surfaces 10D, 10E, and 10F among the six outer surfaces of the instrument body 10. The lower cover body 21 constitutes a part of the back surface 10B from a part of the bottom surface 10A.

  The base case body 20 is formed with the arm insertion hole 15 and the irradiation opening 12 described above, and the lower surface of the base case body 20 is closed by fixing the globe 13 and the lower cover body 21 with screws. An annular packing (not shown) as a sealing member is fitted over the entire periphery of the glove 13 on the edge side. When the globe 13 is attached to the base case body 20, a packing is sandwiched between the globe 13 and the base case body 20, and the irradiation opening 12 is sealed by the packing.

As shown in FIG. 3, the base case body 20 is partitioned by a partition 28 into a clamp mounting chamber 27B on the one end 11A side of the instrument body 10 and a light source chamber 27A on the other end 11B side. The clamp mounting chamber 27B is closed by the lower cover body 21, and the light source chamber 27A is closed by the globe 13. The clamp unit 26 is disposed in the clamp mounting chamber 27B, and the light source unit 25 and the power source 80 constituting the light source are disposed in the light source chamber 27A.
The clamp unit 26 is a support fixture that is inserted and attached to the distal end portion 3 of the support 5 inserted from the arm insertion hole 15 of the instrument body 10. The power source 80 is a control device that supplies power to the light source unit 25 to control lighting of the light source unit 25.

  The light source unit 25 includes a plurality of COB type LEDs 35 (FIG. 4), which is an example of a planar light source, an optical lens body 39 (FIG. 3), and a reflecting mirror 59 (FIG. 3). The instrument body 10 is provided with a plurality of (two in the illustrated example) light source units 25 having the same configuration and light distribution.

The COB type LED 35 has a large number of light emitting elements arranged densely on an LED substrate 34 (FIGS. 4 and 6), and a planar light emitting surface 35A (FIGS. 4 and 6) having a substantially circular shape (which may be a quadrangle) in plan view. Is a light emitting device having a chip on board (COB) structure. The COB type LED 35 emits light of Lambert light distribution (also referred to as cosine light distribution) in the direction of the optical axis FK, with a perpendicular passing through the center OK (FIG. 6) of the light emitting surface 35A as an optical axis FK.
The COB type LED 35 is disposed in the instrument main body 10 in such a posture that the optical axis FK is directed to the bottom surface 10 </ b> A of the instrument main body 10. The LED substrate 34 is formed of, for example, ceramic having high thermal conductivity in order to efficiently transmit the heat generated by the COB type LED 35 to the back surface.

The optical lens body 39 is provided for each COB type LED 35, and is a light distribution control member that controls the light distribution of the COB type LED 35. A horizontally long light distribution extending from the main body 10 to the left and right when viewing the road 2 is obtained.
The reflecting mirror 59 is disposed so as to surround the optical lens body 39 except for the road side, and controls incident light by reflection. The reflecting mirror 59 is formed of, for example, a metal plate such as an aluminum plate, a resin plate on which a reflective material is deposited, or the like.
The optical lens body 39 and the reflecting mirror 59 will be described in detail later.

  As shown in FIG. 4, the instrument main body 10 is a rectangular plate-like substrate, and includes a module substrate 36 fixed to the base case body 20, and each COB type of each light source unit 25 is provided on the module substrate 36. An LED 35 is mounted. Thereby, a plurality of COB type LEDs 35 can be handled as one unit. The module substrate 36 is made of a material that can obtain the electric withstand voltage of the COB type LED 35 and the base case body 20 and has a heat dissipation property, for example, a ceramic material.

  In addition, the instrument body 10 holds the module substrate 36 and the COB LED 35 against the base case body 20 in order to prevent the COB LED 35 from falling when the module substrate 36 or the COB LED 35 is peeled off. A pressing plate 50 is provided. The pressing plate 50 is provided so as to cover the module substrate 36 and is fixed to a boss 42 (see FIG. 5) formed integrally with the base case body 20.

As shown in FIG. 5, a plurality of pedestal surfaces 40 are provided on the ceiling surface 20 </ b> A of the base case body 20 constituting the ceiling of the light source chamber 27 </ b> A so as to be in surface contact with the back surface of the LED substrate 34. Each pedestal surface 40 has a height from the ceiling surface 20 </ b> A so that the module substrate 36 is positioned on a substantially horizontal plane (a certain distance from the opening surface of the irradiation opening 12).
The pedestal surface 40 is formed integrally with the ceiling surface 20A of the base case body 20, and the heat generated by the COB type LED 35 is transmitted through the LED substrate 34 having high thermal conductivity. The heat of the pedestal surface 40 is transferred to the ceiling surface 20A of the base case body 20, and is radiated to the outside from the top surface 10C of the base case body 20, whereby the light source temperature of the COB type LED 35 is appropriate for the light emitting operation. Maintained at temperature.

  In the present embodiment, the base case body 20 is provided with a rectangular frame-shaped surrounding wall 41 surrounding each light source unit 25 on the light source chamber 27A side, and the inside of the surrounding wall 41 is watertight. The light source chamber 27A is waterproofed. That is, over the entire circumference of the surrounding wall 41, the tip 41 </ b> A comes into close contact with the packing of the globe 13 (FIG. 2) carried on the lower cover body 21, thereby sealing the inside of the surrounding wall 41 in a watertight manner.

The clamp mounting chamber 27 </ b> B is provided with a terminal block 70 for connecting an external electric wire drawn out from the distal end portion 3 through the column 5.
A portion of the surrounding wall 41 facing the clamp mounting chamber 27 </ b> B is configured by a partition 28, and a power line drawing hole (not shown) is opened in the partition 28. A power line (not shown) extending from the power source 80 through the power line drawing hole is drawn from the light source chamber 27A to the clamp mounting chamber 27B. At this time, in order to seal the power line drawing hole, a bushing hole (not shown) is fitted into the power line drawing hole, and the bushing is wired through the power line. The power line passed through the bushing is connected to the terminal block 70.

Next, light control in the light source unit 25 described above will be described.
6A and 6B are diagrams showing the positional relationship between the optical lens body 39 and the COB type LED 35. FIG. 6A is a plan view, and FIG. 6B is a view from the back side. 7 is a diagram showing the arrangement relationship between the optical lens body 39 and the COB type LED 35, as in FIG. 6, where FIG. 7A is a view from the road side, and FIG. 7B is a view from the side of the road. FIG. 7 and FIG. 7C are views from the side.

The light source unit 25 includes the optical lens body 39 and the reflecting mirror 59 as a light control body.
As shown in FIGS. 6 and 7, the optical lens body 39 is disposed so as to cover the light emitting surface 35A of the COB type LED 35, and the light on the light emitting surface 35A of the COB type LED 35 is converted into the optical axis FK of the light emitting surface 35A. In the first direction J1 orthogonal to the optical axis FK and condensed in the second direction J2 orthogonal to both the optical axis FK and the first direction J1 and emitted. In other words, when the first direction J1 is referred to as a horizontal width and the second direction J2 is referred to as a vertical width, the optical lens body 39 achieves a horizontal light distribution that extends in the horizontal width direction while limiting the vertical width to a predetermined range. Yes.
The reflecting mirror 59 reflects the light emitted from the light emitting surface 35 </ b> A of the COB LED 35 and leaking without entering the optical lens body 39 to the irradiation region of the optical lens body 39.

  When the road lamp 1 is installed, the road lamp 1 aligns the first direction J1 of the optical lens body 39 with the traffic direction Qt of the road 2 (FIG. 1 (B)) and the second direction J2 in the transverse direction Qc (FIG. 1 ( B)). As a result, the road lamp 1 performs road surface illumination that irradiates far in the traffic direction Qt and restricts irradiation to a range corresponding to the width of the road surface 4 in the transverse direction Qc.

Next, the configuration of the optical lens body 39 will be described in detail.
As shown in FIG. 6A, the optical lens body 39 is integrally provided with a convex lens portion 61, a first reflecting portion 62, a second reflecting portion 63, and a mounting piece 64, and optically. It is obtained by molding a transparent resin material.
The attachment pieces 64 are hook-shaped portions for fixing the optical lens body 39 to the holding plate 50 with screws, and are provided on both sides of the convex lens portion 61 in the first direction J1. As long as the arrangement position and shape of the mounting piece 64 do not impede the optical action of the optical lens body 39, an appropriate mode can be adopted.

  FIG. 8 is a cross-sectional view taken along the line AA of FIG. 6A, and includes a cut surface (hereinafter referred to as a plane cut along a plane parallel to the first direction perpendicular to the optical axis FL, including the optical axis FL of the optical lens body 39). , Referred to as “first direction cross section”). FIG. 9 is a cross-sectional view taken along the line B-B of FIG. 6A, and includes a plane parallel to the second direction perpendicular to both the optical axis FL and the first direction, including the optical axis FL of the optical lens body 39. It is the figure which looked at the cut surface (henceforth "a 2nd direction cross section") cut. FIG. 10 is a view showing the back surface of the optical lens body 39.

The convex lens portion 61 is a part that performs the function of controlling the laterally long light distribution of the optical lens body 39, and when the light of the Lambert light distribution is incident from a planar light source disposed on the back surface, It has an optical function of spreading in the direction J1 and condensing in the second direction J2.
That is, as shown in FIG. 6, the convex lens portion 61 has an elliptical shape in plan view that is long in the first direction J1 in plan view, and has a convex convex shape on the exit surface side as shown in FIG. The light emitting surface 35A of the COB type LED 35 is disposed.
As shown in FIG. 10, the convex lens portion 61 has a shape symmetrical with respect to the center line CN in the first direction J1, and the convex lens portion 61 on the center line CN in the second direction cross section. An axis passing through the point having the greatest thickness is defined as the optical axis FL of the convex lens portion 61. The optical axis of the optical lens body 39 is coaxial with the convex lens portion 61.

  As shown in FIG. 6 (B) and FIGS. 8 to 10, the back surface of the convex lens portion 61 is formed with an entrance recess 65 that is recessed toward the exit surface, and the light emitting surface 35 </ b> A of the COB type LED 35 is It is disposed immediately below the incident recess 65. As shown in FIGS. 6B and 10, the incident recess 65 opens in a substantially rectangular shape extending in the first direction J1, and faces the light emitting surface 35A as shown in FIGS. Is provided with an incident surface 66.

In this optical lens body 39, since the incident surface 66 is provided on the surface recessed by the incident concave portion 65, the light emission of the COB type LED 35 compared with the case where the incident surface 66 is provided on the back surface of the optical lens body 39. The incident surface 66 facing the surface 35A is moved away. This makes it difficult for heat from the COB type LED 35 to be transmitted to the optical lens body 39, thereby suppressing deformation and damage due to heat.
However, when the incident surface 66 is separated from the light emitting surface 35A, the light of the Lambertian light distribution on the light emitting surface 35A corresponds to the separation distance while entering the incident surface 66, as shown in FIGS. Spread by the amount. In order to make this light incident on the incident surface 66, in this optical lens body 39, the area of the incident surface 66 and the opening of the incident concave portion 65 are sufficiently larger than those of the light emitting surface 35A, as shown in FIG. Largely formed.

The light control in the first direction J1 by the convex lens portion 61 will be described with reference to FIG.
The convex lens portion 61 spreads (diffuses) light emitted from a virtual point Va set on the optical axis FL on the back surface side of the convex lens portion 61 and incident on the incident surface 66 in the first direction J1. ) It has an optical function.
That is, in the convex lens portion 61, the incident surface 66 has a surface shape in which light incident from the virtual point Va is refracted in a direction away from the optical axis FL in the first direction cross section. Precisely, it is formed in a concave shape that is recessed toward the convex lens part emission surface 61S side.
In the cross section in the first direction, the light emitting surface 35A of the COB type LED 35 is disposed at the position of the virtual point Va so that the optical axis FL of the convex lens portion 61 and the optical axis FK of the light emitting surface 35A coincide with each other. The light incident on the incident surface 66 from the surface 35A is refracted in a direction away from the optical lenses 39 and the optical axes FK and FL of the light emitting surface 35A.

On the other hand, the convex lens part exit surface 61S of the convex lens part 61 has a curvature to be refracted and emitted in a direction away from the optical axes FK and FL in the first direction cross section. It has a convex surface.
As described above, in the convex lens portion 61, the light is refracted in the direction away from the optical axes FK and FL at the entrance surface 66 and the convex lens portion exit surface 61S, so that the light is reflected in the first direction J. It will be greatly expanded and emitted.

Here, in the cross section in the first direction, the optical axis FL of the convex lens portion 61 and the optical axis FK of the COB type LED 35 coincide with each other. Therefore, if no measures are taken, the light along these optical axes FL and FK Is irradiated without being diffused. Further, in the surface light source of Lambert light distribution, the amount of light in the vicinity of the optical axis FK is larger than that in the vicinity, so that the illuminance in the vicinity of the optical axes FL and FK becomes extremely high in the irradiation area, and the uniformity of the irradiation area Becomes worse.
Accordingly, the convex lens part emission surface 61S of the convex lens part 61 is provided with a diffusion concave part 68 that is recessed toward the incident surface 66 in a region including the optical axis FL in the cross section in the first direction. The diffusion recess 68 has the same optical function as the concave lens in the first direction cross section, and refracts and diffuses light emitted from the vicinity of the optical axis FK in a direction away from the optical axis direction. As a result, the amount of light in the vicinity of the optical axes FL and FK is suppressed.

  In the convex lens portion 61, a concave / convex pattern 79 is formed on the incident surface 66 in the cross section in the first direction in order to reduce Fresnel loss at the convex lens portion emission surface 61S. Details of this will be described later.

The light control in the second direction J2 by the convex lens portion 61 will be described with reference to FIG.
As described above, the convex lens portion 61 has an optical function of condensing light in the second direction J2.
Specifically, in the cross section in the second direction, the incident surface 66 is formed as a convex surface convex toward the light emitting surface 35A, and the convex lens unit 61 is formed by a pair with the convex convex lens unit output surface 61S. It is formed as a so-called biconvex lens. Accordingly, in the cross section in the second direction, the light emitted from the virtual point Va and incident on the incident surface 66 to the convex lens portion 61 is subjected to the optical action of the biconvex lens, and is predetermined from the convex lens portion emission surface 61S. Is emitted toward the focal point (not shown).

In the road lamp 1 (light source unit 25), the light emitting surface 35A of the COB-type LED 35 is one of the second direction with respect to the optical axis FL of the convex lens portion 61 from the position of the virtual point Va in the cross section in the second direction. (Hereinafter referred to as “offset direction”) J2a is offset.
Thereby, in the second direction cross section, the light of the light emitting surface 35A emitted on the offset direction J2a side as viewed from the optical axis FL of the convex lens portion 61 is opposite to the offset direction J2a by the convex lens portion 61. The light is emitted so as to be condensed in a direction (hereinafter referred to as “offset opposite direction”) J2b.

The road lamp 1 is installed with the offset direction J2a aligned with the roadside and the offset opposite direction J2b aligned with the road in the second direction cross section.
Thereby, the light emitted from the convex lens portion emission surface 61S is suppressed on the roadside side in the offset direction J2a while collecting light efficiently on the road surface 4 on the road side in the offset opposite direction J2b. The light leaking to the side of the road will be suppressed.

Light leaking to the side of the road is suppressed as the offset amount δ is increased. However, if the one end 35AT of the light emitting surface 35A protrudes beyond the one end 66Ta on the offset direction J2a side of the incident surface 66, more light is not incident on the incident concave portion 65, which is not efficient.
Therefore, in the second direction cross section, if one end 35AT of the light emitting surface 35A and one end 66Ta of the incident surface 66 are disposed together, most of the light from the light emitting surface 35A can be incident on the incident surface 66.

However, in this COB type LED 35, the light amount distribution on the light emitting surface 35A is not uniform, and the light amount on the light emitting surface 35A is darker at the edge 35AF (FIG. 6B) than the inside thereof. That is, rather than using the entire area of the light emitting surface 35A as a reference, as shown in FIG. 6B, the light emitting surface 35A emits light with a sufficient amount of light to design a desired illuminance and light distribution. It is easier to obtain desired illuminance and light distribution if the light source unit 25 is optically designed based on a light emission range (hereinafter referred to as “effective light emission range”) 71.
Therefore, in the road light 1 (light source unit 25), the end 71T on the offset direction J2a side of the effective light emission range 71 of the light emitting surface 35A is aligned with the one end 66Ta of the incident surface 66 in the second direction cross section. Are arranged.
In addition, when the whole light emission surface 35A is light-emitted with sufficient light quantity, of course, the whole light emission surface 35A becomes the effective light emission range 71.

On the other hand, when light radiated on the side opposite to the offset direction J2b when viewed from the optical axis FL of the convex lens portion 61 is incident on the incident surface 66 in the cross section in the second direction, the light is offset by the convex lens portion 61 in the offset direction. It is emitted toward J2a and becomes a factor of leakage light.
Therefore, in this road light 1 (light source unit 25), as shown in FIG. 9, the light emitting surface 35A (more precisely, the effective light emitting range 71) is placed on the convex lens portion 61 in the second direction cross section. The range W from the optical axis FL to one end 66Ta of the incident surface 66 is limited, and the entire range W is provided.
As a result, most of the light flux on the light emitting surface 35A is collected in the offset opposite direction J2b while minimizing the light emitted from the convex lens portion 61 toward the offset direction J2a.

  However, since the light emitting surface 35A is arranged offset in the offset direction J2a, as shown in FIG. 9, in the second direction cross section, one end 66Ta of the incident surface 66 is removed and the incident concave portion 65 side of the offset direction J2a. The light K1 incident on the inner side surface 65A increases. Such light K1 is a non-control light component that is not controlled by the convex lens portion 61. Therefore, if no countermeasure is taken, the irradiation field is blurred and the illumination efficiency is reduced.

  Therefore, the optical lens body 39 reflects the light K1 that is off one end 66Ta of the incident surface 66 and is incident on the inner side surface 65A of the incident concave portion 65 on the offset direction J2a side, and directs it to the irradiation region of the convex lens portion 61. For this purpose, the first reflecting part 62 is provided.

As shown in FIG. 9, the first reflecting portion 62 has a first reflecting surface 73 and a first emitting surface 74.
The first reflecting surface 73 is a reflecting surface extending in an offset direction J2a from the opening end 65Ta on the offset direction J2a side of the incident recess 65 in the second direction cross section, and is on the offset direction J2a side of the incident recess 65. The light K <b> 1 incident on the inner side surface 65 </ b> A is totally reflected toward the first emission surface 74.

  As shown in FIGS. 6A and 9, the first exit surface 74 is provided continuously to the edge 61SEa on the offset direction J2a side of the convex lens portion exit surface 61S of the convex lens portion 61. . The first exit surface 74 is formed as a surface that gradually increases from the edge 61SEa of the convex lens unit exit surface 61S in the second direction cross section toward the offset direction J2a, and the reflected light of the first reflection surface 73 is opposite to the offset. The light is refracted in the direction J2b (the optical axis FL of the convex lens portion 61) and emitted toward the irradiation range by the convex lens portion 61.

In the first reflecting part 62, the light control of the light K1, which is a non-control light component, is performed independently of the convex lens part 61 by the first reflecting surface 73 and the first emitting surface 74, so that the light is accurately distributed. Light can be controlled and blur in the irradiation field can be suppressed.
In addition, since the first reflecting section 62 directs the light incident on the incident concave section 65 off the incident surface 66 to the irradiation range of the convex lens section 61, a decrease in illumination efficiency can be suppressed.

By the way, in the second direction cross section, the optical lens body 39 moves, for example, the first reflecting surface 73 away from the incident recess 65 in the offset direction J2a, and the bottom surface of the optical lens body 39 covers the light emitting surface 35A. Then, more light from the light emitting surface 35A can be taken into the optical lens body 39.
However, the size of the optical lens body 39 is increased in the second direction J2, and the configuration is complicated to control light incident from the incident surface newly generated between the first reflecting surface 73 and the opening end 65Ta of the incident recess 65. There is a problem of becoming.
Therefore, the road lamp 1 (light source unit 25) includes the reflecting mirror 59 in order to reflect light leaking in the offset direction J2a without entering the optical lens body 39 from the light emitting surface 35A.

FIG. 11 is a diagram showing the relationship between the optical lens body 39, the light emitting surface 35A of the COB type LED 35, and the reflecting mirror 59. As shown in FIG. FIG. 11 is a cross-sectional view in the second direction, similar to FIG.
The reflecting mirror 59 includes an auxiliary reflecting surface 59 </ b> A disposed to face the first reflecting surface 73 of the optical lens body 39. This auxiliary reflecting surface 59A reflects the light K2 that is not incident on the optical lens body 39 but enters the optical lens body 39 out of the light incident surface 65A of the light of the light emitting surface 35A in the second direction cross section, and is a convex lens. It is a reflecting surface directed to the irradiation range by the unit 61.
By the reflection by the auxiliary reflecting surface 59A, the non-control light component that does not enter the optical lens body 39 and leaks in the offset direction J2a is further suppressed, and the leakage light is suppressed and the illumination efficiency is maintained.

In the cross section in the second direction, the light K1 that is off the incident surface 66 and is incident on the incident concave portion 65 is reflected by the first reflecting surface 73, so that the size of the auxiliary reflecting surface 59A is incident on the optical lens body 39. It is sufficient that the light K2 leaking in the offset direction J2a without being reflected can be reflected.
Therefore, in the cross section in the second direction, below the straight line L connecting the end 71T of the effective light emission range 71 that is the light emission area of the light emitting surface 35A and the opening end 65Ta of the incident concave portion 65 of the optical lens body 39, The height Ha is set at the upper end 59AT of the auxiliary reflecting surface 59A.

If the optical lens body 39 does not include the first reflecting surface 73, the auxiliary reflecting surface 59A needs to reflect the light K1 that is off the incident surface 66 and incident on the inner surface 65A of the incident recess 65. Therefore, it is necessary to increase the height Ha to a position that greatly exceeds the straight line L. In this case, the thickness of the light source unit 25 is increased and it is difficult to fit in the instrument body 10.
On the other hand, in the light source unit 25, since the optical lens body 39 includes the first reflecting surface 73, the height Ha of the auxiliary reflecting surface 59A is suppressed and the thickness is reduced.

  As shown in FIGS. 3 and 11, the reflecting mirror 59 includes side reflecting surfaces 59B facing the optical lens body 39 on both sides of the optical lens body 39 in the first direction J1 (traffic direction Qt). ing. The side reflection surface 59B reflects light that is emitted from the optical lens body 39 at an angle close to the horizontal direction in the first direction J1, and is shielded inside the instrument body 10, and suppresses a decrease in instrument efficiency.

Next, returning to FIG. 9, the optical lens body 39 includes the second reflecting portion 63 as described above. The second reflecting portion 63 reflects the light K3 that is off the incident surface 66 and is incident on the inner surface 65B on the side opposite to the offset direction J2b of the incident concave portion 65 and directs it to the irradiation region of the convex lens portion 61. The second reflecting surface 75 and the second emitting surface 76 are provided.
The second reflection surface 75 is a reflection surface extending in an offset opposite direction J2b from the opening end 65Tb on the opposite side J2b in the offset opposite direction J2 of the incident recess 65 in the second direction cross section. The light incident on the inner side surface 65 </ b> B is totally reflected toward the second emission surface 76.
As shown in FIG. 6A and FIG. 9, the second emission surface 76 is provided continuously to the edge 61SEb on the J2b side opposite to the offset direction of the convex lens portion emission surface 61S of the convex lens portion 61. Yes.

That is, as shown in FIG. 9, the second reflecting surface 75 reflects the light K <b> 3 toward the offset opposite direction J <b> 2 b side from the convex lens portion emitting surface 61 </ b> S in the second direction cross section, and the light from the second emitting surface 76. By emitting K3, similarly to the first reflecting surface 73, light control independent of the convex lens portion 61 is realized.
The second exit surface 76 is formed as a surface that gradually increases from the edge 61SEb of the convex lens portion exit surface 61S toward the offset opposite direction J2b in the cross section in the second direction. The light K3 reflected by the second reflecting surface 75 is incident on the second exit surface 76, and the incident light is refracted by the second exit surface 76 and directed to the irradiation range by the convex lens portion 61.

Further, in the optical lens body 39, the second reflecting surface 75 is formed larger than the first reflecting surface 73. That is, since the light emitting surface 35A is shifted in the offset direction J2a, the spread of the light K3 on the light emitting surface 35A when reaching the inner surface 65B on the side opposite to the offset direction J2b of the incident recess 65 is offset direction. It becomes larger than the inner side surface 65A on the J2a side.
Even if the light K3 spreads in this way, the second reflecting surface 75 is formed larger than the first reflecting surface 73, so that the light K3 leaks in the offset opposite direction J2b (that is, the road side). It can be sufficiently suppressed.
Similarly to the first reflecting portion 62, the second reflecting portion 63 performs light control independently of the convex lens portion 61, so that the light distribution can be controlled with high accuracy and blurring in the irradiation field can be prevented. Can be suppressed. Further, since the light K3 that is off the incident surface 66 and is incident on the incident concave portion 65 is directed to the irradiation range of the convex lens portion 61, a decrease in illumination efficiency is also suppressed.

  The road lamp 1 includes the light source unit 25 having the optical lens body 39, the reflecting mirror 59, and the COB type LED 35 as a light source, so that the road on the near side as viewed from the road lamp 1 in the transverse direction Qc. It is possible to illuminate the road surface 4 while suppressing light leaking to the side 6 and also suppressing light leaking to the side of the road farther from the road 2 when viewed from the road lamp 1.

  Further, in the traffic direction Qt, the optical lens body 39 spreads and emits the light of the light emitting surface 35A away from the optical axes FL and FK, so that the range along the traffic direction Qt is illuminated. In this traffic direction Qt, as shown in FIG. 8, the light emitted from the optical lens body 39 irradiates farther as the angle θ (hereinafter referred to as “exit angle”) θ with respect to the optical axes FL and FK increases. it can. The optical lens body 39 is designed to increase the luminance when the outgoing angle θ is 55 ° to 65 ° (light K5) in the traffic direction Qt (first direction cross section) and to illuminate the distant road surface 4. .

However, it is known that Fresnel loss occurs on the refractive surface of the lens. That is, if the refraction angle γ at the exit surface is increased in order to increase the exit angle θ, the reflection at the exit surface increases and the exit efficiency decreases. The refraction angle γ is defined by the angle of the emitted light with respect to the normal line in the first direction cross section of the convex lens portion emission surface 61S.
Therefore, in the optical lens body 39, as described above, the concave / convex pattern 79 is formed on the incident surface 66 in the cross section in the first direction.

FIG. 12 is a ray diagram in the first direction cross section of the convex lens portion 61 of the optical lens body 39, and FIG. 13 is an enlarged view of a portion indicated by an arrow Y in FIG.
The concave / convex pattern 79 on the incident surface 66 refracts the light from the center OK of the light emitting surface 35A at the incident surface 66 so that the refraction angle γ at the convex lens portion emission surface 61S is 50 ° or less. is there.

  As shown in FIG. 12, the concavo-convex pattern 79 includes a plurality of concave portions 81 and convex portions 82 along the direction from the intersection position 65P of the incident concave portion 65 with the optical axis FL to the opening end 65T in the first direction cross section. Are arranged alternately. Each of the convex portions 82 has a substantially triangular shape that is convex toward the opening side (the virtual point Va side) of the incident concave portion 65 in the first direction cross section, so that the concave / convex pattern 79 has a substantially serrated cross section. Yes. One side surface of each convex portion 82 is an incident side inclined surface 83 that is inclined so that light of the virtual point Va is incident, similarly to the side surface of the prism having a triangular cross section included in the so-called Fresnel lens. That is, it can be said that the incident surface 66 is provided with a plurality of incident-side inclined surfaces 83, which are formed in a stepped surface shape by the uneven pattern 79.

As shown in FIG. 13, the light at the virtual point Va is refracted in the direction away from the optical axis FL at the refraction angle φ when passing through the incident side inclined surface 83. This refraction angle φ is defined by the angle of transmitted light with respect to the normal line in the first direction cross section of the incident side inclined surface 83.
Since each convex part 82 refracts incident light in a direction away from the optical axis FL and makes it incident on the convex lens part output surface 61S, even if the refraction angle γ at the convex lens part output surface 61S is small, the light is emitted. The angle θ can be increased.

If the refraction angle γ at the convex lens part exit surface 61S is 70 ° or less, the Fresnel loss is sufficiently small and has little effect on the instrument efficiency.
However, in this light source unit 25, the COB type LED 35 which is a planar light source is used as a light source, and since the light emitting surface 35A is relatively large, the refraction angle with respect to light incident from a position shifted from the virtual point Va is considered. The refraction angle γ at the convex lens part exit surface 61S is suppressed to 50 ° or less.
In other words, by setting the refraction angle γ at the convex lens portion emission surface 61S to 50 ° or less, the light source is located at a position slightly deviated from the virtual point Va when the light source unit 25 using the point light source as a light source is assembled. Even if it is placed, the Fresnel loss is reliably suppressed.

In order to set the refraction angle γ at the convex lens portion exit surface 61S to 50 ° or less, the refraction angle φ of the incident side inclined surface 83 of each convex portion 82 is incident according to the incident angle of light at the virtual point Va. It is adjusted by changing the inclination angle of the side inclined surface 83.
Specifically, as shown in FIG. 12, in the first direction cross section, out of the light emitted from the virtual point Va, the light in the range α having an angle with respect to the optical axes FL and FK of 10 ° to 45 ° is incident. In the range Ua, the incident side inclined surface 83 of the convex portion 82 provided in the range Ua is configured such that the inclination angle ω (FIG. 13) with respect to the optical axes FL and FK has an angle of 30 ° to 35 °. Has been.
On the other hand, of the light radiated from the virtual point Va, in the range Ub in which the light in the range β having an angle with respect to the optical axes FL and FK of 45 ° or more is incident, the incidence of the convex portion 82 provided in the range Ub The side inclined surface 83 is configured to have an inclination angle ω of 45 ° or less with respect to the optical axes FL and FK.
FIG. 14 shows the correspondence between the inclination angle ω of the incident side inclined surface 83 of the optical lens body 39 and the inclination angle ψ of the convex lens portion emission surface 61S for each of the light beams (1) to (6) shown in FIG. It is shown. The inclination angle ψ of the convex lens portion emission surface 61S is defined by the angle of the convex lens portion emission surface 61S with respect to the optical axes FL and FK in the first direction cross section. Note that the numerical values shown in FIG. 14 are merely examples.

Here, since the incident surface 66 has a line-symmetric shape with respect to the optical axis FL in the cross section in the first direction, the incident-side inclined surfaces 83 face each other at the intersection position 65P where the incident surface 66 and the optical axis FL intersect. It becomes the valley part of the recessed part 81 which can be made.
In other words, the light control by the incident side inclined surface 83 is accurately performed by arranging the optical axis FK of the light emitting surface 35A in the valley portion.
In addition, the convex lens part emission surface 61S is provided with the diffusion recess 68 described above at the intersection with the optical axis FL corresponding to the intersection position 65P, and the light quantity near the optical axes FL and FK is increased. It is suppressed.

By configuring each incident side inclined surface 83 of the incident surface 66 in this way, the refraction angle γ of the light K5 emitted in the first direction J1 at the emission angle θ of 55 ° or more at the convex lens portion emission surface 61S. Can be reliably set to 50 ° or less, and the Fresnel loss can be suppressed.
Further, even if the light source is not a point light source but a planar light source having a light emitting point in the vicinity of the virtual point Va, the refraction angle γ at the convex lens portion emission surface 61S is 70 ° or less for all light. And the Fresnel loss can be reliably suppressed.
In addition to this, by forming the concave / convex pattern 79 on the incident surface 66, the thickness of the convex lens portion 61 can be suppressed similarly to a so-called Fresnel lens, so that the incident surface 66 is thermally affected by the light emitting surface 35A. The thickness of the light source unit 25 can be suppressed while being sufficiently separated so as not to be received.

Here, as shown in FIG. 13, the convex portion 82 having the incident side inclined surface 83 on one side surface has a flat portion 85 formed at the tip thereof.
The plane portion 85 prevents light that has entered and refracted from the incident-side inclined surface 83 from entering the other non-incident-side inclined surface 84 of the convex portion 82 and reflected from the inside to become stray light K6. Is. That is, the flat surface portion 85 has a shape in which the tip portion of the range 83F where the refracted incident light is incident on the non-incident side inclined surface 84 of the incident side inclined surface 83 of the convex portion 82 is cut off by the flat surface. In addition, the plane is formed in a shape that refracts incident light toward the valley 81A of the recess 81 (that is, the end of the non-incident side inclined surface 84).
Thereby, since the light incident on the flat surface portion 85 is directed toward the convex lens portion exit surface 61S without entering the non-incident side inclined surface 84, generation of stray light can be prevented.

According to the embodiment described above, the following effects can be obtained.
That is, according to the present embodiment, since the one end 71T of the effective light emission range 71 of the light emitting surface 35A of the COB-type LED 35 and the one end 66Ta of the incident surface 66 are arranged together in the second direction cross section, the light emitting surface 35A. The optical axis FK is offset with respect to the optical axis FL of the convex lens portion 61, and the light on the light emitting surface 35A is condensed and emitted by the convex lens portion 61 in the offset opposite direction J2b.
Thereby, the emission of light from the convex lens portion 61 in the offset direction J2a in the second direction J2 is suppressed, and leakage light to the one end 66Ta side is suppressed.
In particular, in the second direction cross section, by combining one end 71T of the effective light emission range 71 of the light emitting surface 35A and one end 66Ta of the incident surface 66, the light of the effective light emission range 71 can be efficiently incident on the incident surface 66 while being convex. Light emitted from the lens-shaped lens portion 61 in the offset direction J2a can be greatly reduced.

Further, in the second direction cross section, when the effective light emission range 71 of the light emitting surface 35A is matched with one end 66Ta of the incident surface 66 of the optical lens body 39, the light enters the incident concave portion 65 off the incident surface 66 and enters the convex lens portion. The non-control light component that is not controlled by 61 increases, and the light component that does not enter the optical lens body 39 increases in the first place, which may reduce the illumination efficiency.
On the other hand, according to the present embodiment, the light K1 deviating from the incident surface 66 of the incident recess 65 is controlled by the first reflecting surface 73 and used for illumination, so that the non-control light component is suppressed and the illumination efficiency is good. Maintained.
In addition to this, since the auxiliary reflecting surface 59A of the reflecting mirror 59 is disposed to face the first reflecting surface 73 of the optical lens body 39, the light K2 that is not incident on the optical lens body 39 after coming off the entrance recess 65 is also this. Since it is controlled by the auxiliary reflecting surface 59A and used for illumination, the non-control light component is further suppressed, and the illumination efficiency is maintained better.

Further, according to the present embodiment, the effective light emission range 71 of the light emitting surface 35A is set within the range W from the optical axis FL of the convex lens portion 61 to the one end 66Ta of the incident surface 66 in the second direction cross section.
As a result, most of the luminous flux on the light emitting surface 35A can be collected in the offset opposite direction J2b while minimizing the light emitted from the convex lens portion 61 toward the offset direction J2a.

Further, according to the present embodiment, the optical lens body 39 is provided continuously to the edge 61SEa of the convex lens portion exit surface 61S of the convex lens portion 61, and the light reflected by the first reflecting surface 73 is a convex lens. The first emission surface 74 that refracts and emits toward the irradiation range of the part 61 is provided.
Thereby, since the light which becomes a non-control light component is controlled by the 1st reflective surface 73 and the 1st output surface 74 independently of the convex lens part 61, light distribution can be controlled accurately. , Blur in the irradiation field can be suppressed. In addition, since the light that is off the incident surface 66 and is incident on the incident concave portion 65 is directed to the irradiation range of the convex lens portion 61, a decrease in illumination efficiency can be suppressed.

According to the present embodiment, in the second direction cross section, the optical lens body 39 controls the light K3 that has entered the incident recess 65 off the incident surface 66 on the side opposite to the offset direction J2b of the incident surface 66. Two reflection surfaces 75 are provided.
With this configuration, leakage light due to the light K3 can be suppressed, and since the light K3 is directed to the irradiation range of the convex lens portion 61, a decrease in illumination efficiency can also be suppressed.

  Further, according to the present embodiment, since the second reflecting surface 75 is formed larger than the first reflecting surface 73, the light K3 that has spread relatively large in the offset opposite direction J2b (that is, the road side) is controlled. It is possible to sufficiently suppress the leakage of light in the offset opposite direction J2b.

According to the present embodiment, the road lamp 1 includes the light source unit 25 as a light source, aligns the first direction J1 with the traffic direction Qt of the road surface 4, and the second direction J2 in the transverse direction Qc orthogonal to the traffic direction Qt. And the road surface 4 is illuminated.
As a result, it is possible to efficiently illuminate the road surface 4 by effectively using the light that becomes the leakage light while suppressing the leakage light to the roadside 6 of the road surface 4.

Further, according to the present embodiment, the incident surface 66 of the optical lens body 39 is provided with a plurality of incident-side inclined surfaces 83, and each of the incident-side inclined surfaces 83 is refracted by the convex lens portion emitting surface 61S of the light K5. The angle γ is formed to be 50 ° or less.
Accordingly, it is possible to irradiate light toward the far side with an emission angle θ of, for example, 55 ° or more with respect to the optical axis FL, while suppressing the Fresnel loss at the convex lens portion emission surface 61S.

Further, according to the present embodiment, since the refraction angle γ at the convex lens portion exit surface 61S is set to 50 ° or less, which is smaller than 70 ° where the Fresnel loss is sufficiently small, the light is emitted from a location shifted from the optical axis FL. Even with respect to light, the refraction angle γ at the convex lens part exit surface 61S can hardly exceed 70 °.
In particular, according to the light source unit 25 of the present embodiment, the optical lens body 39 uses the COB type LED 35 as an example of a planar light source as a light source, and the optical lens body 39 sets the refraction angle γ of light at the convex lens portion emission surface 61S to COB. 70 degrees or less with respect to any light on the light emitting surface 35A of the LED 35.
As a result, the light source unit 25 that reliably suppresses the Fresnel loss and efficiently irradiates far away is realized.

Further, according to the present embodiment, in the first direction cross section, the incident surface 66 of the optical lens body 39 has the plurality of convex portions 82 having the incident-side inclined surface 83 on one side surface, A flat portion 85 was formed at the tip.
As a result, the light incident on the flat surface 85 enters the non-incident side inclined surface 84 which is the surface opposite to the incident side inclined surface 83 of the convex portion 82 and is not internally reflected, and thus the convex lens portion emitting surface 61S. Because it goes to, stray light can be prevented.

  Further, according to the present embodiment, the optical axis FK of the COB type LED 35 is aligned with the valley portion formed by the two incident side inclined surfaces 83 facing each other, so that the incident side inclination with respect to the light incident along the optical axis FK. The light control by the surface 83 is performed accurately.

  In addition, according to the present embodiment, the convex lens portion exit surface 61S is configured to have the diffusion recess 68 at the intersection with the optical axis FL corresponding to the intersection 65P, so that the optical axes FL and FK in the irradiation field. The amount of light in the vicinity is suppressed and the uniformity is increased.

  Moreover, according to this embodiment, the road light 1 provided with the plurality of light source units 25 can suppress the Fresnel loss and efficiently obtain the road light 1 that irradiates the far direction of the traffic direction Qt.

  The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

In the above-described embodiment, the COB type LED 35 is exemplified as the planar light source, but the planar light source is not limited to this. As the planar light source, other light emitting elements such as an organic EL can be used as long as the light source emits planar light.
An arbitrary light source can be used as a point light source that is not a planar light source.

Moreover, in embodiment mentioned above, although the road light 1 was illustrated as a lighting fixture which illuminates a road surface, a lighting fixture is not restricted to this. For example, the present invention can be applied to a tunnel lighting device, a street light, a security light, and the like.
Further, the present invention is not limited to a lighting fixture in which the fixture main body is supported by a support column, but can be applied to a lighting fixture supported by a wall of a building, for example.
Furthermore, the present invention is not limited to a lighting device that illuminates a road surface, and can be suitably applied to any lighting device as long as the light distribution is controlled so as to illuminate far away using an optical lens body.

1 road lights (lighting fixtures)
2 road 4 road surface 25 light source unit 35 COB type LED (light source, surface light source)
35A Light emitting surface 39 Optical lens body 59 Reflecting mirror 59A Auxiliary reflecting surface 61 Convex lens portion 61S Convex lens portion exit surface (exit surface)
65 Incident recess 65P Crossing position 66 Incident surface 68 Diffusion recess (recess)
79 Concave and convex pattern 82 Convex part 83 Incident side inclined surface (inclined surface)
85 Plane part Optical axis of FK COB type LED FL Optical axis of convex lens part J1 First direction J2 Second direction Qc Transverse direction Qt Traffic direction Va Virtual point

Claims (5)

A light source;
An optical lens body having an incident concave portion that covers the light source, and a convex emission surface that spreads and emits light incident from the incident surface of the incident concave portion in a first direction orthogonal to the optical axis;
With
The light source is
A planar light source having an optical axis at the center of the light emitting surface;
In a first direction cross section including the first direction and parallel to the optical axis,
A plurality of inclined surfaces are formed on the incident surface of the optical lens body,
Each of the inclined surfaces is formed so that a refraction angle at the exit surface of incident light is 50 ° or less ,
A light source unit , wherein a refraction angle of light on the emission surface is 70 ° or less with respect to any light of the planar light source. A light source;
An optical lens body having an incident concave portion that covers the light source, and a convex emission surface that spreads and emits light incident from the incident surface of the incident concave portion in a first direction orthogonal to the optical axis;
With
In a first direction cross section including the first direction and parallel to the optical axis,
A plurality of inclined surfaces are formed on the incident surface of the optical lens body,
Each of the inclined surfaces is formed so that a refraction angle at the exit surface of incident light is 50 ° or less,
The light incident unit has a plurality of convex portions each having the inclined surface on one side surface, and a flat portion is formed at a tip of the convex portion. 3. The light source unit according to claim 1, wherein, in the first direction cross section, the optical axis of the light source is aligned with a valley portion formed by two inclined surfaces facing each other. In the first cross section, wherein the exit surface of the optical lens body, according to claim 1, characterized in that it comprises a recess recessed to a side of the incident surface at the intersection of the optical axis of the light source Light source unit. An illumination fixture comprising the plurality of light source units according to any one of claims 1 to 4.

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